Reminds me of when I lived in California in the mountains. My water came from the highest peak in the area a few miles away. also contained lots of serpentine rock...which also considerable amount of arsenic in it!,and probably some other bad shit! Ohh well. it was good ngl. Do remember puking my guts out randomly for no apparent reason like my first week there. maybe some new microbe my boy wasn't used to. That spring water is going to be better than most people's water granted there's nothing crazy going into it, and if you trust it enough to drink yourself I would not give a second thought about giving it to my plants. but wouldn't hurt for the sake of yourself to get a better idea of whats in it or could potentially. I would no drink the spring water here on the east cost where i live lol